Add to the following code to output the diameter, circumference and area of the circle; each on a new line. Each modified line must contain an arithmetic operator and should use the existing variables.

#include

int main()

{

const float PI = 3.14159;

const float radius = 5.6;

std::cout << "radius:\t\t" << radius << std::endl;

std::cout << "diameter:\t";

std::cout << "circumference:\t";

std::cout << "area:\t\t";

return 0;

}